#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
void initial(void); 
uchar num,co;
uchar a[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
main()
{
 initial();
 while(1);

}

void initial(void)   //初始化
{
 P1=0xfe;
 co=0;
 num=0;
 TMOD= 0x01;       
 TH0=(65536-10)/256;      
 TL0=(65536-10)%256;
 EA=1;           
 ET0=1;         
 TR0=1;
}
void timeT0() interrupt 1
{
 TH0=(65536-10)/256;      
 TL0=(65536-10)%256;
 num++;
 
 if(num==1)
 { co++;
  num=0;
     P1=a[co];
  if(co==8)
   co=0;
 }
  
}

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